#2513: Bad location info for flag warnings
-----------------------+----------------------------------------------------
Reporter: Feuerbach | Owner: igloo
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.9
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
-----------------------+----------------------------------------------------
Comment (by simonpj):
I've realised that good location info for flag warnings is more important
than I thought when you are using `--make` or compiling multiple modules.
Below is a dump from building GHC itself. Saying `<no location info>`
does not tell me which module has the offending pragma; or whether it's
the command line. (In this case it's the latter.)
{{{
/64playpen/simonpj/builds/HEAD-1/ghc/stage1-inplace/ghc -M -dep-makefile
dist-stage2/build/.depend -package-name ghc-6.9 -hide-all-packages -no-
user-package-conf -i -idist-stage2/build -inativeGen -ibasicTypes -icmm
-icodeGen -icoreSyn -icprAnalysis -ideSugar -ighci -ihsSyn -iiface -imain
-iparser -iprelude -iprofiling -irename -isimplCore -isimplStg
-ispecialise -istgSyn -istranal -itypecheck -itypes -iutils -ivectorise
-idist-stage2/build/autogen -Idist-stage2/build/autogen -Idist-
stage2/build -I../libffi/build/include -Istage2plus
-I../libraries/base/cbits -I../libraries/base/include -I. -Iparser -Iutils
-optP-DUSE_EDITLINE -optP-DGHCI -optP-include -optPdist-
stage2/build/autogen/cabal_macros.h -odir dist-stage2/build -hidir dist-
stage2/build -stubdir dist-stage2/build -package Cabal-1.5.3 -package
array-0.1 -package base-4.0 -package bytestring-0.9 -package
concurrent-0.1 -package containers-0.1 -package directory-1.0 -package
editline-0.2 -package filepath-1.1 -package haskell98-1.0.1 -package
hpc-0.5 -package old-time-1.0 -package process-1.0.1 -package st-0.1
-package template-haskell-2.2 -package unix-2.2 -O
-DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=2 -Wall -fno-warn-name-shadowing -fno-
warn-orphans -XCPP -XMagicHash -XUnboxedTuples -XPatternGuards
-XForeignFunctionInterface -XEmptyDataDecls -XTypeSynonymInstances
-XMultiParamTypeClasses -XFlexibleInstances -XRank2Types
-XPatternSignatures -idist-stage2/build -Werror -H64m -O0 -fasm -Rghc-
timing -O0 -fasm AsmCodeGen MachCodeGen MachInstrs MachRegs NCGMonad
PositionIndependentCode PprMach RegAllocColor RegAllocInfo RegAllocLinear
RegAllocStats RegArchBase RegArchX86 RegCoalesce RegLiveness RegSpill
RegSpillClean RegSpillCost DsMeta TcSplice Convert ByteCodeAsm ByteCodeFFI
ByteCodeGen ByteCodeInstr ByteCodeItbls ByteCodeLink Debugger GhciMonad
GhciTags InteractiveUI LibFFI Linker ObjLink RtClosureInspect BasicTypes
DataCon Demand Exception Id IdInfo Literal MkId Module Name NameEnv
NameSet NewDemand OccName RdrName SrcLoc UniqSupply Unique Var VarEnv
VarSet BlockId CLabel Cmm CmmBrokenBlock CmmCPS CmmCPSGen CmmCPSZ
CmmCallConv CmmCommonBlockElimZ CmmContFlowOpt CmmCvt CmmExpr CmmInfo
CmmLex CmmLint CmmLive CmmLiveZ CmmOpt CmmParse CmmProcPoint CmmProcPointZ
CmmSpillReload CmmTx CmmUtils CmmZipUtil DFMonad Dataflow MachOp MkZipCfg
MkZipCfgCmm OptimizationFuel PprC PprCmm PprCmmZ StackColor
StackPlacements ZipCfg ZipCfgCmmRep ZipCfgExtras ZipDataflow Bitmap
CgBindery CgCallConv CgCase CgClosure CgCon CgExpr CgForeignCall CgHeapery
CgHpc CgInfoTbls CgLetNoEscape CgMonad CgParallel CgPrimOp CgProf
CgStackery CgTailCall CgTicky CgUtils ClosureInfo CodeGen SMRep CoreFVs
CoreLint CorePrep CoreSubst CoreSyn CoreTidy CoreUnfold CoreUtils
ExternalCore MkCore MkExternalCore PprCore PprExternalCore CprAnalyse
Check Coverage Desugar DsArrows DsBinds DsCCall DsExpr DsForeign DsGRHSs
DsListComp DsMonad DsUtils Match MatchCon MatchLit HsBinds HsDecls HsDoc
HsExpr HsImpExp HsLit HsPat HsSyn HsTypes HsUtils BinIface BuildTyCl
IfaceEnv IfaceSyn IfaceType LoadIface MkIface TcIface BreakArray
CmdLineParser CodeOutput Config Constants DriverMkDepend DriverPhases
DriverPipeline DynFlags ErrUtils Finder GHC HeaderInfo HscMain HscStats
HscTypes InteractiveEval PackageConfig Packages ParsePkgConf PprTyThing
StaticFlags SysTools TidyPgm Ctype HaddockLex HaddockParse HaddockUtils
LexCore Lexer Parser ParserCore ParserCoreUtils RdrHsSyn ForeignCall
PrelInfo PrelNames PrelRules PrimOp TysPrim TysWiredIn CostCentre SCCfinal
RnBinds RnEnv RnExpr RnHsDoc RnHsSyn RnNames RnPat RnSource RnTypes CSE
FloatIn FloatOut LiberateCase OccurAnal SAT SetLevels SimplCore SimplEnv
SimplMonad SimplUtils Simplify SRT SimplStg StgStats Rules SpecConstr
Specialise CoreToStg StgLint StgSyn DmdAnal SaAbsInt SaLib StrictAnal
WorkWrap WwLib FamInst Inst TcArrows TcBinds TcClassDcl TcDefaults TcDeriv
TcEnv TcExpr TcForeign TcGenDeriv TcHsSyn TcHsType TcInstDcls TcMType
TcMatches TcPat TcRnDriver TcRnMonad TcRnTypes TcRules TcSimplify
TcTyClsDecls TcTyDecls TcTyFuns TcType TcUnify Class Coercion FamInstEnv
FunDeps Generics InstEnv TyCon Type TypeRep Unify Bag Binary BufWrite
Digraph Encoding FastBool FastFunctions FastMutInt FastString FastTypes
Fingerprint FiniteMap GraphBase GraphColor GraphOps GraphPpr IOEnv
Interval LazyUniqFM ListSetOps Maybes MonadUtils OrdList Outputable Panic
Pretty State StringBuffer Unicode UniqFM UniqSet Util VectBuiltIn VectCore
VectMonad VectType VectUtils Vectorise
<no location info>:
Warning: -XPatternSignatures is deprecated: use -XScopedTypeVariables
or pragma {-# LANGUAGE ScopedTypeVariables#-} instead
<no location info>:
Failing due to -Werror.
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2513#comment:3>
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